> If everyone drives as fast as they can while meeting some perceived safety level, then does that mean these efforts are unlikely to affect safety and merely t

> If everyone drives as fast as they can while meeting some perceived safety level, then does that mean these efforts are unlikely to affect safety and merely to slow everyone down? No. It means that people are usually wrong when they judge the safety level of their driving speed on a nice clear road that happens to have pedestrians next to it or trying to cross it, but are more accurate at judging safety when they are primed to expect obstacles, steering challenges, other actors moving not in parallel with them on the road itself. https://www.ite.org/technical-resources/traffic-calming/ https://www.ite.org/technical-resources/traffic-calming/